return {
  "neovim/nvim-lspconfig",
  dependencies = {
    "williamboman/mason.nvim",
    "williamboman/mason-lspconfig.nvim",
    "folke/neodev.nvim",
  },
  config = function()
    require("comment").setup()
    local servers = {
      rust_analyzer = {},
      pyright = {},
      lua_ls = {
        Lua = {
          workspace = { checkThirdParty = false },
        },
      },
    }
    local on_attach = function()
      -- todo
    end
    -- Global mappings.
    -- See `:help vim.diagnostic.*` for documentation on any of the below functions
    vim.keymap.set('n', '<space>e', vim.diagnostic.open_float)
    vim.keymap.set('n', '[d', vim.diagnostic.goto_prev)
    vim.keymap.set('n', ']d', vim.diagnostic.goto_next)
    vim.keymap.set('n', '<space>q', vim.diagnostic.setloclist)

    -- Use LspAttach autocommand to only map the following keys
    -- after the language server attaches to the current buffer
    vim.api.nvim_create_autocmd('LspAttach', {
      group = vim.api.nvim_create_augroup('UserLspConfig', {}),
      callback = function(ev)
        -- Enable completion triggered by <c-x><c-o>
        vim.bo[ev.buf].omnifunc = 'v:lua.vim.lsp.omnifunc'

        -- Buffer local mappings.
        -- See `:help vim.lsp.*` for documentation on any of the below functions
        local opts = { buffer = ev.buf }
        vim.keymap.set('n', 'gD', vim.lsp.buf.declaration, opts)
        vim.keymap.set('n', 'gd', vim.lsp.buf.definition, opts)
        vim.keymap.set('n', 'K', vim.lsp.buf.hover, opts)
        vim.keymap.set('n', 'gi', vim.lsp.buf.implementation, opts)
        vim.keymap.set('n', '<C-k>', vim.lsp.buf.signature_help, opts)
        vim.keymap.set('n', '<space>wa', vim.lsp.buf.add_workspace_folder, opts)
        vim.keymap.set('n', '<space>wr', vim.lsp.buf.remove_workspace_folder, opts)
        vim.keymap.set('n', '<space>wl', function()
          print(vim.inspect(vim.lsp.buf.list_workspace_folders()))
        end, opts)
        vim.keymap.set('n', '<space>D', vim.lsp.buf.type_definition, opts)
        vim.keymap.set('n', '<space>rn', vim.lsp.buf.rename, opts)
        vim.keymap.set({ 'n', 'v' }, '<space>ca', vim.lsp.buf.code_action, opts)
        vim.keymap.set('n', 'gr', vim.lsp.buf.references, opts)
        vim.keymap.set('n', '<space>f', function()
          vim.lsp.buf.format { async = true }
        end, opts)
      end,
    })
    require("neodev").setup()
    require("mason").setup()
    require("mason-lspconfig").setup {
      ensure_installed = vim.tbl_keys(servers),
      handlers = {
        function(server_name)
          require("lspconfig")[server_name].setup {
            settings = servers[server_name],
            on_attach = on_attach,
            capabilities = require("cmp_nvim_lsp").default_capabilities(),
          }
        end
      }
    }
  end
}
